/*
 * Copyright 2006-2018 The MZmine 2 Development Team
 * 
 * This file is part of MZmine 2.
 * 
 * MZmine 2 is free software; you can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 * 
 * MZmine 2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with MZmine 2; if not,
 * write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
 * USA
 */

package net.sf.mzmine.desktop.impl;

import java.awt.Frame;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.event.MenuEvent;
import javax.swing.event.MenuListener;

import net.sf.mzmine.main.MZmineCore;

/**
 * Dynamically-built Windows menu.
 * 
 */
public class WindowsMenu extends JMenu implements ActionListener, MenuListener {

  private static final long serialVersionUID = 1L;

  private final JMenuItem closeAllMenuItem;

  /**
   * Create the "Windows" menu for a MDI view
   */
  public WindowsMenu() {

    super("Windows");

    this.addMenuListener(this);

    closeAllMenuItem = new JMenuItem("Close all windows");
    closeAllMenuItem.addActionListener(this);
    add(closeAllMenuItem);

    addSeparator();

  }

  public void actionPerformed(ActionEvent event) {

    Object src = event.getSource();

    if (src instanceof FrameMenuItem) {
      FrameMenuItem item = (FrameMenuItem) src;
      Window frame = item.getFrame();
      frame.toFront();
      frame.requestFocus();
    }

    if (src == closeAllMenuItem) {
      // Close all Swing Frames
      for (Frame window : Frame.getFrames()) {
        if (window != MZmineCore.getDesktop().getMainWindow()) {
          window.dispose();
        }
      }
    }

  }

  class FrameMenuItem extends JRadioButtonMenuItem {

    private static final long serialVersionUID = 1L;
    private Frame window;

    FrameMenuItem(Frame window, ActionListener listener) {
      super(window.getTitle());
      addActionListener(listener);
      this.window = window;
    }

    Window getFrame() {
      return window;
    }

  }

  public void menuCanceled(MenuEvent event) {}

  public void menuDeselected(MenuEvent event) {}

  public void menuSelected(MenuEvent event) {

    // Remove all previous items
    while (getItemCount() > 2)
      remove(2);

    int windowsAdded = 0;
    // Create a menu item for each window
    for (Frame window : Frame.getFrames()) {

      if (window.isVisible()) {
        FrameMenuItem newItem = new FrameMenuItem(window, this);
        add(newItem);
        windowsAdded++;
      }
    }

    // Disable the Close all button if we only have the main window
    closeAllMenuItem.setEnabled(windowsAdded > 1);
  }

}
